Патент USA US2118369код для вставки
24, 1938. 5D. vANclL v 2,118,369v ' MACHINE FOR GRINDINGLAMINATED ARTICLES Filed March 26, 1956 6 Sheets-Sheet I la 45 , | - 'llllll I Il: || um /f Will/1111111111114 s 707 â ‘ - '» ? „ _ „lg ® v y ~ - ` _url I _ l/////////////)A » jf I I l /llll//l//lì INVENTOR, l >May 24, 1938- _2,118,369 E. D. vANclL MACHINE FOR GRINDING LAMINATED ARTICLES Filed March 26,' 1936 6 Sheets-Sheet 2 /07 INVENTOR. K fßáfzßß l/wf/z ATTORNEY May 24, 1938» K 2,118,369 E. D. vANclL MACHINE FOR GRINDING' LAMINATED ARTICLES ` MNSN , Filed March 26, 1936 6 Sheets-Sheet 5 MN MNN. î _ à.ÈQ_ , „Q .\„„w â „Wm _. j@ ÉàI _ w - mM\, §p\,F \@„y_\f\ mßm/fdÉV/áA/á. WAI.- ' ' May 24, 1938-v >.2,118,369 E. D. vANc:||.MACHINE FOR GRINDING LAMINATED ARTICLES Filed March 26, 1936 6 Sheets-Sheet` 4 oo INVENTOR. »fßGA/ßß /á/rca ATTORNEY. May 24, 1938. E. D. vANclL 2,118,369 MACHINE FOR GRINDING LAMINATED ARTICLES ì Filed March 26, 1956 6 Sheets-Sheet 5 50 Iz'a 76’ INVENTOR ' . v BY ¿696,449.0 lf/4/Yc/4 ATTORNEY » May 24, 193s. 2,118,369 E. D. VANCIL MACHINE FOR GRINDING LAMINATED ARTICLÉS Filed March 26, 1936 f/.„ú ,M - Ä n: ä MW m ß M 4f //////////Í/////// 6 Sheets-Sheet 6 M2. Í@ _l /ß / «705 // / ,im . ¿WmÄ Rw H V. 4 2,118,369 Patented May 24, 1938 UNITED STATES PATENT OFFICE 2,118,369 MACHINE FOR GRINDING ARTICLES LAMINATED’ Edgar D. Vancil, Cincinnati, Ohio, assignor to Cincinnati Grinders Incorporated, Cincinnati, Ohio, a corporation of Ohio ' Application March 26, 1936, Serial No. 70,982 12 Claims. This invention relates to grinding machines, and more particularly to a special automatic machine for grinding rectilinear grooves. One of the objects of this invention is to pro 5 vide a machine for performing a grooving opera tion which cannot be readily accomplished on conventional machines without a multiplicity of adjustments. cept by a multiplicity of operations. An additional object of this invention is to provide a special automatic machine for grind ing grooves in automobile springs for the attach ment of side-sway eliminators. Other objects and advantages of the present in ,.)0 vention should be readily apparent by reference ‘ to the following specification, considered in con junction with the accompanying drawings form ing a part thereof and it is to be understood that any modifications may be made in the eX act structural details there shown and described, 25 within the scope of the appended claims, With out departing from or exceeding the spirit of the invention. v Referring to the drawings in which like refer 30 ence numerals indicate like or similar parts: Figure 1 is an elevation of a- machine tool em bodying the principles of this invention. Figure 2 is a plan view of the machine shown in Figure 1. 35 Figure 3 is a vertical section on the line 3_3 of Figure 2. ` Figure 4 is a cross section on the line 4_4 of Figure 3. l Figure 5 is a section taken on the line 5_5 of 40 Figure 3. Figure 6 is a section on the line 6_6 of Fig ure 5. Figure 7 is a section on the line 'I-'I of Fig ure 3. 45 Figure 8 is a section on the line 8_8 of Fig ure '7. Figure 9 is a section on the line 9_9 of Fig ure 7. Figure 10 is a section on the line I0_I0 of 50 . Flgure 1. Figure 11 is a section on the line II-II of Figure 6. Figure 12 is a section on the line I2--I2 of 55 Figure 5. Figure 13 is an elevational view of the Work holding carriage. Figure 14 is a diagram of the electrical control circuit. Figure 15 is a diagram of the fluid pressure 25 control circuit. Figure 16 is an expanded View of the one revolu tion cam track. A further object of this invention is to pro w vide an improved simplified mechanism for de ilecting and holding a vehicular spring as under load conditions, and forming a configuration therein which could not be formed otherwise ex 35 (Cl. 51_92) The machine comprises, in general, a large table, part of which is ñxed, and whereupon a 10 laminated article may be assembled and manipu lated, and the other part of which is movable whereby relative adjustment between the article and a tooling element, such as a grinding mech anism, may be eiîected. :15 Referring to Figures 1, 2, and 4, the reference numeral Ill indicates the bed of the machine and upon this is supported a movable table por tion Ii and a ñXed table portion I2, these por tions lying in the same plane. .'26 A work supporting carriage I3, such as shown in Figure 13, is provided for manual movement from a work loading position, indicated generally by the reference numeral I4, in Figure 2, to a tooling position, indicated generally by the ref- ¿25 erence numeral I5 in the same figure. When the carriage is in the work loading position, a work piece I6, which may be a laminated vehicu lar spring, such as used on automobiles and the like, may be placed in the ñXture and located |30 by a pin I6' passed through the eye in the end of the spring and resting in a semi-circular notch formed in the end of the work holder. A second pin It” may beA passed through the eye in the other end of the spring and slidably rested on the upper edge of the sides of the work holder. A power operated ram, such as I'I, is moved down ward to hatten out the laminated article into the form in which it is shown in Figure 4. This ram is attached to a piston, not shown, which is 40 movable in a cylinder I8 which is supported in overhanging relation With respect to the ñxed table portion I2 and the work carriage is manu ally movable to a position under the ram where by upon movement of a control valve I9, the ram 45 may be power moved downward a suitable amount to flatten out the article. By reference to Figures 1 and 13, it will be seen that the work carrier has two pairs of upstanding side supports 20 and 2| and holes 50 22 and 23 are drilled through each pair. When the article has been suiliciently flattened, bolts, such as 24 shown in Figures 1 and 4, may be passed through these holes to hold the Work in position. The ram I'I may now be elevated and 55 2 2,118,369 the carrier moved as on the supporting rollers 25 from the work loading position to the tooling position shown in Figure 2. The work carrier has a pair of countersunk holes 25 formed in the uprights and the carrier is positioned so that these countersunk holes are in line with dowel pins 2l having cone-shaped heads 28. The dowel pins are carried in one jaw 29 of a vise, the other jaw 39 being power oper 10 able to move the carrier against the jaw 29 and in so doing cause the cone-shaped heads 28 to enter the countersunk holes 25, and at the same time slightly raise the carrier from the table so that it will clear the same. The jaws 39 are pivotally connected to the lower end of bell cranks 3l and 32 which are, in turn, connected to an equalizer cross bar 33 second switch 63, being closed, will short circuit switch 53 and maintain the coil 59 energized. By the switch 52 being closed, it is now possible when the slide 55 moves forward and automati cally opens switch 53 and closes switch 52, to energize the starting coil 54, one end of which is connected by line 95 to the power line Gland the other end connected through the line 55, closed switch 52, line 51, closed switch 52 and line 58 to the other power line 55. 10 When the valve 52, Figure 15, is moved to its starting position, shown in this figure, the pres sure admitted to line 38 also passes through line 69 to the lower end of cylinder '19. This causes upward movement of the container piston ‘H and piston rod 12 which, as shown in Figure 3, has rack teeth 13 formed thereon in mesh with gear pivotally connected at 35 to the end of piston` 14. The gear M is keyed to the end of shaft 15, rod 35. This piston rod carries a piston 35 20 which is movable in a cylinder 3l. This cylin der is connected as shown in Figure l5 by a channel 38 to port 39 of a control valve 40 hav ing an intake pressure port 4|. The valve plung er 42, which may be manually rotated by ,a _han 25 dle 4_3, shown in Figure lof the drawings, serves to connect the pressure port M to the port 35 whereby the workV carrier may be clamped to a vertically movable slide 55 which is, in turn, car ried by a cross slide 55. It will, of course, be '30 evident that since the piston and cylinder >above mentioned must be carried by the vertical slide 44 that suitable flexible connections must be made between the cylinder and the control valve 59 which is located in the .bed of the machine with 35 its operating handle in a Vconvenient place for ac cess by the operator. Attention is >invited pins 2B also serve to with respect to a pair 40 41 which are located l to the fact that the dowel properly locate the work of grinding wheels 45 and opposite the slide ¿ill and are suitably spaced on a spindle 4B to grind grooves in the work in the desired spaced rela tion. Each wheel is also of a width correspond ing to the width of groove desired in the work. 45 These grinding wheels may be rotated by suit able power means, not shown, and may also be provided with a suitable truing mechanism such as that indicated generally by the reference nu meral 49 in Figure 1. Since such truing mech anisms are well known in the art, further descrip tion thereof is not believed to be necessary. Power operable mechanism has been provided for reciprocating the slide M vertically to trav erse the work tangentially relative to the faces of the grinding wheels and for automatically infeeding the work toward the face of the grind ing wheels to determine the depth of the groove. This mechanism is driven by a prime mover 5i?. This motor is started by the automatic closing of 60 switch 5l which is controlled by the electrical circuit shown in Figure 14. This circuit has a pair of switches 52 and 53, the former of which is held open by a cam 54 attached to the rear of a sub-support 55 when the same is in a retracted position, and the latter switch is held closed by a similar cam means attached to the rear of slide 55. Since the switch 53 was closed by the previous return of slide 55, it completed a circuit from the line main58, power coil> source 59 and56line through 59 to line the 51, other switch line 5i of the power source. 'It Energization of the coil 59 closed switch 62 and this automatically locked the switch, because even although switch 53 will be opened when the slide 55 starts forward, a as shown in Figure 5, which has an eccentric arm 16, Figure 11„attached to the end thereof and interengaging a-link Tf, as more particularly shown in Figure 6. This link is connected by a pin 'i8 to the rear end of slide 55. Referring now to Figure 3, it will be evident that upon admission of fluid to the lower end of cylinder 'lli the piston 7| will move upward ,and thereby through the rack and pinion connec tion rotate the eccentric 16 in a counterclockwise direction and thereby move the sub-support 55 and Ythe work carried thereby into grinding rela tion with the grinding wheels. Simultaneously, this movement will eii‘ect the opening of switch 53 and the closing of switch 52 to start actuation of the prime mover 59. The prime mover is connected through the fol lowing mechanism to slide 29 to effect reciproca tion thereof. As shown in Figure 7, the arma ture shaft of the prime mover has a sprocket wheel 'i9 which is connected by a chain 80 to a sprocket wheel 8i secured to the end of shaft 82. 40 This shaft, as shown in Figure 3, has a pinion gear 83 keyed to the end thereof in mesh with gear 8f! keyed to the end of shaft 85. This shaft is anti-frictionally supported in the housing of slide 45, and on the forward end is provided with , a crank arm 85 which is connected by link 8'1 to ' a pin B8 projecting from the rear of slide 29. It will be apparent that as the shaft 85 is contin uously rotated, the slide 29 will be vertically re ciprocated, thereby moving the work tangentially . relative to the face of the grinding wheels. It is also necessary, in addition to reciprocating the work, to gradually feed the work into the grinding wheels in order to effect the desired depth of groove. To this end, the shaft 85 has a a spiral gear 89 secured thereto, as shown-in Figure 3, which intermeshes with a spiral gear 99 keyed to shaft Si. Through this means, the shaft 9| is rotated at a very slow rate relative to shaft 85 and the latter serves to drive an in feeding mechanism. In furtherance of this end, the shaft 9| has attached thereto the member 92 in which is formed a cam groove 93 for receiv ing a roller 94 attached to the end of a crank arm 95. This crank arm, as more particularly 65 shown in Figure 8, is secured to a shaft 96 which has splines 91 formed in one end thereof for ro tating a gear sector 98. This gear sector, as shown in Figure 5, intermeshes with a pinion 9T’ keyed to shaft 98', which shaft, as shown in Figure 6, has a screw thread 99 cut on one por tion thereof. This screw thread is rotated rela tive to a nut |99 which is held against rotation by a Worm i0l intermeshing with gear teeth §02 cut on the periphery of the nut. A spring ID3 -3 2,118,369 may be interposed between a ñxed portion of the nut and a movable portion |04 thereof Yfor elimi nating backlash. - » Attention is invited to the fact that the gear (Il sector 98 is mounted in a housing |05 which is attached tothe sub-support 55 and therefore it is necessary to provide the spline connection in order that the shaft 96 may move with the slide 45. The housing |05 also contains the gear 97 and a thrust bearing` |06 which holds the shaft ' 98 against axial movement, whereby upon rota tion of the screw 99 the nut |00, which is held against axial movement in the slide 45, will cause the slide to move relative to the sub-support 55. Manually operable means have also been pro 15 vided for eiîecting relative adjustment between the support 45 and the sub-support 55 for set-up purposes and the like, and this mea-ns, which is more particularly shown in Figure 10, comprises a hand wheel |01 operatively connected to a shaft |08, the latter being anti-frictionally journaled in the slide 45. A pinion |09 secured to the end of this shaft intermeshes with a gear ||0 ñxed with shaft | || to which is secured a worm |0| meshing with a worm |02. The worm and worm gear are those previously mentioned, which nor mally hold the nut |00 against rotation, but upon rotation of the hand wheel |01, when the screw 99 is stationary, it will be apparent that relative 30 vrotation between the screw and nut can still be effected and the slide 45 adjusted relative to the sub-support 55. Referring now to Figure 3, the shaft 85 serves as a common actuator for a first branch trans mission which reciprocates the vertical slide 29 and for a second branch transmission, which » continuously effects infeedin'g of the work during reciprocation. Due tothe reduction in rate ef fected by the spiral gears 89 and 90, the shaft 9| 40 is rotated at a very slow speed, whereby the slide 29 may make a large number of reciprocations `.for one revolution of the shaft 9|. Means are provided whereby the shaft 9| is, in effect, a o-ne revolution shaft, whereby, after the shaft line 6'8. Therefore, upon continuedl movement of thedog | l5 and opening of switch H8, the coil 54 will be de-energized and the switch 5| will be automatically opened to stop the motor 50. At the same time, a brake H9, which is held open r by the solenoid |20 coupled across the motor lines by branches |2| and |22, will become de energized and a spring |23 will apply the brake to prevent overrun of the motor. The machine is now automatically stopped and -1 -10 the operator may throw the valve 42, shown in Figure 15, clockwise to connect the pressure port 4| to the line §24, which will cause downward movement of the piston 1| and thereby retrac tion of the sub-support 55 and parts carried ".15 thereby to move the work away from the grind ing wheels. This pressure also flows to the upper end of cylinder 3?, causing downward movement of the piston rod 35 and release of the clamp jaws 30. It will be noted that the return from §20 this cylinder must pass through a throttle valvev |25 because the check valve |26 will be automati cally closed at this time, thereby delaying the»v release of the work luntil the sub-support 55 has been fully retracted. When the sub-support has reached its re tracted position it will open switch 52, Figure 14. and close switch 53, thereby energizing coil 59 and closing the switch 52, which thus conditions the circuit so that upon thenext forward move 30 ment of the slide 55 the closing of switch 52 will energize coil 64 and close the motor starting switch 5|. 'I‘he work carrier I3 may now be rolled out onto the table I2 and turned around on the table and reinserted in the carrier clamping jaws for grinding grooves in the other side of the work. There has thus been provided a simple mech anism whereby a vehicular spring may be power deilected and held as under actual conditions of ...40 use, and a configuration machined therein by a simple operation, while so held, and which could not be formed otherwise yexceptby a multiplicity of operations.' has made one revolution, certain controls will I claim: be operated to stop the grinding operation. l. A grinding machine having rotatable grind In View of this, the cam groove 93 in the mem ber 92 has been >so formed that during one revo lution thereof it will effect the necessary infeed ing, followed by a subsequent dwell for clean up purposes, and then a rapid retraction of the parts. The shape of this cam groove is shown in 'expanded view in Figure 16 in which the or dinate | |2'indicates the starting point, and from this point through an angle of substantially 252 degrees to the ordinate | i3 a continuous infeed is effected, and during the next 36 degrees the cam path is straight so as to provide a dwell for lcleaning up purposes. During the neXt ’72 degrees the cam path is so formed as to eiîect a rapid retraction of lthe work slide relative to the grinding wheel. . The shaft 9| has a dog carrier ||4 to which is 45 ing means, means for supporting and moving work in operative relation to the grinding means including a sub-support, a work support mounted thereon for relative movement along paths an 50 gularly related to one another, power operable means for reciprocating the work support along one path of its movement and uni-directionally along its second path oi' movement, power oper able means for moving the sub-support to posi 55 tion the work support in a tangential p-lane rel- "' ` ative to the grinding means, and means respon sive to said positioning movement of the'sub support to initiate actuation of both of said power operable means. 60 2. In a machine tool having a slide power mov- ' able relative to a tooling element to effect a ma chining operation, the combination with the slide attached a dog H5. A pair of radially arranged plungers ||6 and ||'| are provided for actuation by the'dog and these plungers operate switches 63 and ||8 respectively. As viewed in Figure 9, the dog wheel l i4 rotates clockwise whereby the switch 63 is operated first and, as seen in Figure 14, when this switch is open, it de-energizes the of a removable work holder, cooperating means on the slide and work holder for locating one 65 coil 59 because the switch 53 is also open at this time and this causes automatic opening of switch position. 52. The current flowing through the coil 04 which holds switch 5| closed now travels through line 66, closed switch E2 and closed switch 5| t0 with respect to the other and thereby positioning the work in desired relation to the tooling ele ment, and anti-frictional supporting rollers car ried by the work holder whereby the same may be v readily moved from the slide to a work loading 70 3. A grinding machine having a grinding wheel, a ñrst slide movable in one plane, a work slide carriedthereby and movable in a second plane, means carried by one of said slides for 75 ¿2,118,369 :reciprocatingthe otherrelative thereto, means ' for feeding the iirst slide, a prime mover for driv- ' ¿ing both of said means, a separate power oper iable device for moving the slides into grinding Vposition, and means automatically operable upon -said last-named movement for starting the said '8, Ina> grinding machine` havinga fgrlnding wheel, and a »work supporting slide-movable in one direction to reciprocate the workV in ,opera tive engagement" with the lgrinding wheel, ,and in a 'second direction toinfeed thework relative to the grinding wheel; of »a prime mover, means coupling the prime mover for reciprocation. ofthe primev mover. 4. -A ' grinding machine ~-having a grinding wheel, a> first slide> movable in one plane, a work -slidegcarried thereby and movable in a Second plane, means carried by one of said slides for 'reciprocating the other relative'thereto,„means -for feeding the ñrst slide,»a prime mover for driv ing both of said means, a separate power oper ' 115 able device for moving the slides into grinding position, and means automatically operable upon -said last-named movement for starting the said --prime mover, said automatically 'operable means lincluding a power operable switch, and a'pilot electrical control Acircuit including a -switch slide, a one revolution cam coupled tothe prime >`mover for infeeding the slide, saidV cam having-*a ?lrst cam portion for continuously infeeding> the n slide, asecond portion for causing-»a dwell in the :slide anda third portion for rapidly retracting the slide, and" means simultaneously vopera-bleat the endof one revolution'of the >cam to stop. the . prime mover. 9. In a grinding machine, the combinationcofI «a grinding wheel, of means for operatively :asso ciatinga work piece therewith ior‘grinding there by, including .a slide,-a ñuid cperablepiston car ried thereby for clamping work> thereinfalsub-r. 20 4adapted to be closed by the'movement of said , -support’for'the‘ slide includingv a fluid operable slide to a grinding position. ì 5. In a grindingV machine, the combination of ~a A»piston‘for causing positioning of the ñrst slide. in ~a grinding plane'with respect to the grinding wheel, »and aA single control valve- for controlling >actuation of» each` of said pistons. lOwA 'grinding machine having a ,grinding r'grinding wheel, of means for operatively-.associ ating a work piece therewith for grinding thereby, includingza ñrst slide having Í-a power operable clamp mounted thereon, a removable »work holder wheel, a Work support, power operable means for -adapted to be inserted> in` said clamp, and there -eiîecting multiple reciprocations Aof >the work :by secured to the slide, .a supporting slide for the support're‘lative to the 'grinding wheel, -airotat first slide, a sub-support for moving all of said Vable mechanism coupled for actuation-:bysaidh 30 parts- into a` grinding position with respect to the power operable means at aslow rate as‘respects -'grinding wheel, and iiuid operable means for the period of reciprocations of the worksupport, actuating said clamping means and said sub-sup means coupling said mechanism for feeding" the port. ' `slide toward’the grinding wheel, and. means re sponsive to one revolution of said mechanism ,. 35 35 l6,'In -argrinding machine,>the combination` of va `grinding wheel, a slide reciprocable `relative to for stopping said power operable means. the-grinding wheel and having a clamping jaw, llpIn a -grinding machine for Y‘grooving V`a a Vremovable work holder adapted to be inserted Ylaminated bodyor the like, the combination-"with in said jaw, fluid operable means for holding‘the a grinding wheel support, of amechanisrn op work carrier in'said jaw, a sub-support for said posing the wheel for determining presentation :of y, 40 slide, fluid operable'means for'moving the sub work in- operative relation thereto, includingia support and thereby the slide into grinding po support for introduction of .a work piece., a'lwork Sition with respect> to the grinding wheel and re carrying slide adjacent the support Aand recipro tracting the same, a common control valve for cable in a direction tangentially ofthe grinding each of said fluid operable means and movable to a- position to eiîect simultaneously unclamping of said jaws and retraction of the sub-support, and means to delay operation of said unclamping means until the sub-support has been retracted. 7. In a grinding machine, the combination 50 with a grinding wheel, of a slide movable toward ‘ and from the grindingwheel, a-work table and a vprime mover carried by the slide, means Opera 55 , 6.0 tively connecting the work table to the prime »mover for reciprocation therebyand for infeed ing the same relative to the slide, an electrical control circuit including a power operable switch for the prime mover, a pilot control circuit for said switch including a ñrst pair of pilot switches operable by the slide for closing said power op erable switch, and a second pair of pilot switches successively operable by the prime mover for opening said power operable switch. wheel face, a ñrst power operable means for rais 45 ing the work from the support and securing same " on the reciprocable slide, additional power means for effecting multiple reciprocationsl of the slide and attached work tangentiallyras respects the grinding wheel‘face, means operable in timed're lation with the reciprocationsV of the slide for~` eiîecting a gradual movement of the slide and work in a radial direction as respects the opera tive facecof'the grinding wheel, and’means for Adiscontinuing both the feeding and reciprocatingî; 55 movements. 12. A machine as specified in claim 11 in.which . the discontinuing means comprises a single revo lution control device operable by >and Yin’ti-med relation with the power driven feed mechanism. 80 EDGAR D. VANCIL.